A multi-vibrator ultrasonic lapping device

Abstract

The application discloses a kind of multi-vibrator ultrasonic lapping devices, including amplification rod, it is extended to the first end from the second end along the length direction;Multiple piezoelectric vibrator, connect to the first end of the amplification rod, multiple piezoelectric vibrator is arranged in parallel;Tool head, connect to the second end of the amplification rod;Lapping disc, it is set to rotate around the own axis of lapping disc;Clamp, it is set between the tool head and the lapping disc, the clamp is equipped with several roller installation through-hole.Multiple piezoelectric vibrator is connected to amplification rod, solve the restriction that amplification rod diameter is less than piezoelectric ceramic ring of piezoelectric vibrator quarter wavelength, so that amplification rod output end face diameter is big, so larger size workpiece can be processed, ultrasonic energy not only can be directly acted on cylindrical roller, but also can process multiple cylindrical rollers at a time, while improving processing efficiency, ensure the batch accuracy of cylindrical roller processing.

Description

Technical Field

[0001] The invention is used in the field of bearing processing, and particularly relates to a multi-vibrator ultrasonic grinding device. Background Art

[0002] Against the backdrop of rapid technological advancements, precision machine tools, aerospace equipment, and precision instruments are placing increasing demands on bearings across all aspects. However, roller fatigue failure is the primary form of bearing failure. Therefore, reducing roller fatigue failure is crucial for extending bearing life, and developing high-quality rollers is imperative. Surface finishing methods for cylindrical rollers include centerless grinding, double-plane polishing, chemical mechanical finishing, electrochemical mechanical polishing, and magnetic fluid grinding. However, these methods suffer from low production efficiency, complex manufacturing systems, and high costs.

[0003] Ultrasonic machining technology is unaffected by the material's electrical conductivity and can be used to process both metal and non-metal materials. It has been applied in a variety of fields, such as ultrasonic drilling, ultrasonic grinding, and ultrasonic welding. In recent years, ultrasonic-assisted machining has been widely used due to its ability to achieve excellent machining quality. The ultrasonic hammering effect can modify the metal surface and improve its fatigue resistance.

[0004] In the prior art, ultrasonic hammering generally uses an ultrasonic transducer to perform ultrasonic rolling strengthening on the cylindrical roller of the bearing through a horn, transmitting static pressure and ultrasonic impact vibration to the surface of the rotating cylindrical roller of the bearing, generating an extrusion effect and causing the metal material to undergo a small elastic-plastic deformation, thereby improving the fatigue strength of the cylindrical roller. However, when the lateral dimension of the horn is designed to be too large and there is material inhomogeneity, the influence of the Poisson effect will cause the ultrasonic horn to vibrate laterally in the lateral direction. Therefore, the diameter of the piezoelectric ceramic ring is limited to less than one-quarter of the wavelength, making the diameter of most existing transducers less than 50 mm. Ultimately, the horn diameter is very small, which can only meet the needs of single cylindrical surface processing, resulting in low processing efficiency and low batch precision of cylindrical roller processing. Summary of the Invention

[0005] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art and to provide a multi-vibrator ultrasonic grinding device.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] A multi-vibrator ultrasonic grinding device, comprising:

[0008] an amplifying rod extending from a first end to a second end along a length direction;

[0009] A plurality of piezoelectric vibrators are connected to the first end of the amplifier rod, and the plurality of piezoelectric vibrators are arranged in parallel;

[0010] a tool head connected to the second end of the amplification rod;

[0011] A grinding disc, arranged to rotate about its own axis;

[0012] A clamp is arranged between the tool head and the grinding disc, and the clamp is provided with a plurality of roller mounting through holes.

[0013] In combination with the above implementation methods, in some implementation methods, the piezoelectric vibrator includes a rear cover plate, a first piezoelectric ceramic ring, a first electrode sheet, a second piezoelectric ceramic ring, a second electrode sheet and a front end cover, and the rear cover plate, the first piezoelectric ceramic ring, the first electrode sheet, the second piezoelectric ceramic ring, the second electrode sheet and the front end cover are connected in series and fixed to the first end of the amplifier rod by bolts.

[0014] In combination with the above implementation, in some implementations, an ultrasonic generator is further included, and the first electrode sheets of the multiple piezoelectric vibrators are connected to the positive pole of the same ultrasonic generator, and the second electrode sheets of the multiple piezoelectric vibrators are connected to the negative pole of the same ultrasonic generator.

[0015] In combination with the above implementations, in certain implementations, the clamp deviates from the axis of the grinding disc, is limited by a swing arm, and can rotate around the axis of the clamp under the rotation of the grinding disc.

[0016] In combination with the above-mentioned implementation methods, in some implementation methods, the fixture includes a positioning plate, the thickness of the positioning plate is smaller than the thickness of the cylindrical roller, the positioning plate is provided with a plurality of roller mounting through holes, the roller mounting through holes pass through the positioning plate along the thickness direction, and the roller mounting through holes are circular holes in which the cylindrical roller can rotate around the axis of the roller mounting through holes.

[0017] In combination with the above implementations, in certain implementations, the fixture is provided with a plurality of roller mounting through holes, and the plurality of roller mounting through holes are distributed around the axis of the fixture itself.

[0018] In combination with the above implementations, in certain implementations, an annular retaining ring extending toward both sides along the thickness direction is provided on the edge of the positioning plate.

[0019] In combination with the above-mentioned implementations, in some implementations, the tool head extends from the first end face to the second end face along the thickness direction, the first end face of the tool head is connected to the second end of the amplifier rod, the tool head has an outer peripheral surface extending obliquely from the first end face to the second end face, and the outer peripheral surface is provided with a spiral groove extending from the first end face to the second end face, and the multi-vibrator ultrasonic grinding device also includes a grinding liquid supply system for supplying grinding liquid to the cylindrical roller, and the grinding liquid supply system is provided with a liquid supply port extending to the first end face.

[0020] In combination with the above implementations, in certain implementations, the polishing liquid of the polishing liquid supply system is silicon carbide polishing liquid.

[0021] In combination with the above implementations, in some implementations, the amplifier rod is a stepped amplifier rod, and the diameter of the first end of the amplifier rod is greater than the diameter of the second end.

[0022] One of the above-mentioned technical solutions has at least one of the following advantages or beneficial effects: The technical solution of the present invention uses a cylindrical bearing roller as the curved surface machining object. The cylindrical roller is placed in the roller mounting through-hole of a fixture and is confined by the fixture between an amplifier rod and a grinding disc. Piezoelectric vibrators are used to convert electrical energy into high-frequency vibration mechanical energy. Under ultrasonic high-frequency hammering, the cylindrical roller undergoes grain refinement on its surface and generates residual compressive stress, thereby improving the fatigue strength of the cylindrical roller. In the technical solution of the present invention, multiple piezoelectric vibrators are used and connected in parallel to an ultrasonic generator to ensure that the vibration modes of the multiple piezoelectric vibrators are consistent, thus avoiding vibration mode aliasing. The multiple piezoelectric vibrators are commonly connected to the amplifier rod, resolving the limitation that the amplifier rod diameter is less than one-quarter of the wavelength of the piezoelectric ceramic ring of the piezoelectric vibrator. This allows for a larger output end diameter of the amplifier rod, thereby enabling machining of larger workpieces. The output end of the stepped amplifier rod directly acts on the cylindrical roller, preventing changes in the longitudinal vibration mode. Ultrasonic energy not only directly affects the cylindrical roller, but also enables the simultaneous processing of multiple cylindrical rollers, improving processing efficiency while ensuring batch accuracy. Furthermore, the rotating grinding disc polishes the cylindrical roller, combining surface polishing and surface modification for the cylindrical roller, effectively improving its quality.

[0023] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0025] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0026] Figure 2 This is an exploded schematic diagram of an embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of a fixture structure according to an embodiment of the present invention;

[0028] Figure 4 Schematic diagram of the perpendicularity between the axis of a cylindrical roller and the friction force f it experiences according to one embodiment of the present invention;

[0029] Figure 5 Schematic diagram showing that the axis of a cylindrical roller is neither perpendicular nor coincident with the friction force f it experiences, according to an embodiment of the present invention;

[0030] Figure 6 Schematic diagram showing the coincidence of the axis of a cylindrical roller and the friction force f it experiences in one embodiment of the present invention;

[0031] Figure 7 Schematic diagram of the decomposition of the cylindrical roller friction force f into an axial component f1 and a radial component f2 according to an embodiment of the present invention;

[0032] Figure 8 This is a schematic diagram of a grinding liquid supply system supplying grinding liquid to a tool head according to an embodiment of the present invention. DETAILED DESCRIPTION

[0033] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it should not be understood as a limitation on the scope of protection of the present invention.

[0034] In the present invention, if directions (up, down, left, right, front and back) are described, it is only for the convenience of describing the technical solution of the present invention, and does not indicate or imply that the technical features referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as a limitation of the present invention.

[0035] In the present invention, "several" means one or more, "multiple" means more than two, "greater than," "less than," "exceeds," etc. are understood to exclude the number itself; "above," "below," "within," etc. are understood to include the number itself. In the description of the present invention, the use of "first" or "second" is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0036] In the present invention, unless otherwise expressly defined, terms such as "disposed," "installed," and "connected" should be interpreted broadly. For example, they may refer to direct connection or indirect connection through an intermediate medium; fixed connection or detachable connection or integral molding; mechanical connection or electrical connection or mutual communication; and internal connection between two components or interaction between two components. Those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0037] See also Figure 1 、 Figure 2An embodiment of the present invention provides a multi-vibrator ultrasonic grinding device, comprising an amplifier rod 4, a plurality of piezoelectric vibrators, a tool head 19, a grinding disc 1, and a fixture 3. The amplifier rod 4 extends longitudinally from a first end to a second end. The plurality of piezoelectric vibrators are connected to the first end of the amplifier rod 4. The piezoelectric vibrators are used to convert electrical energy into mechanical energy of super-frequency vibration. The amplifier rod 4 can amplify the ultrasonic energy from the plurality of piezoelectric vibrators. The plurality of piezoelectric vibrators are arranged in parallel to ensure that the vibration modes of the plurality of piezoelectric vibrators are consistent, thereby avoiding vibration mode aliasing. The tool head 19 is connected to the second end of the amplifier rod 4 and is used to transmit the vibration of the amplifier rod 4 to the cylindrical roller 2. The grinding disc 1 is configured to rotate about its own axis. The fixture 3 is disposed between the tool head 19 and the grinding disc 1 and is provided with a plurality of roller mounting holes. The grinding disc 1 can be driven by an electric motor, and the rotation speed of the grinding disc 1 can be adjusted. The cylindrical roller 2 is placed between the tool head 19 and the grinding disc 1. When the grinding disc 1 rotates, a friction force is applied to the cylindrical roller 2, so that the cylindrical roller 2 can rotate around its own axis.

[0038] The technical solution of the present invention uses a cylindrical bearing roller as the surface processing object. The cylindrical roller 2 is placed in the roller mounting through-hole of the fixture 3 and is confined between the tool head 19 and the grinding disc 1 by the fixture 3. The piezoelectric vibrator is used to convert electrical energy into mechanical energy of high-frequency vibration. Under the ultrasonic high-frequency hammering, the surface of the cylindrical roller 2 undergoes grain refinement and generates residual compressive stress to improve the fatigue strength of the cylindrical roller 2. In the technical solution of the present invention, multiple piezoelectric vibrators are used. The piezoelectric vibrators are connected in parallel to the ultrasonic generator to ensure that the vibration modes of the multiple piezoelectric vibrators are consistent, avoiding vibration mode aliasing. The multiple piezoelectric vibrators are commonly connected to the amplifier rod 4 to solve the problem that the amplifier rod 4 is limited by the diameter of the piezoelectric ceramic ring of the piezoelectric vibrator being less than one-quarter wavelength. The output end face diameter of the amplifier rod 4 is large, thereby enabling the processing of larger workpieces. The output end of the stepped amplifier rod 4 directly acts on the cylindrical roller 2 to avoid changes in the longitudinal vibration mode. Ultrasonic energy not only directly affects the cylindrical roller 2, but also enables the simultaneous processing of multiple cylindrical rollers 2, improving processing efficiency while ensuring batch accuracy of the cylindrical rollers 2. Furthermore, because the rotating grinding disc 1 polishes the cylindrical rollers 2, the present invention combines surface polishing and surface modification of the cylindrical rollers 2, effectively improving the quality of the cylindrical rollers 2.

[0039] In some embodiments, see Figure 1 、 Figure 2The piezoelectric vibrator includes a rear cover plate (13, 10), a first piezoelectric ceramic ring (9, 14), a first electrode plate (8, 15), a second piezoelectric ceramic ring (7, 16), a second electrode plate (6, 17) and a front end cover (5, 18); the rear cover plate (13, 10), the first piezoelectric ceramic ring (9, 14), the first electrode plate (8, 15), the second piezoelectric ceramic ring (7, 16), the second electrode plate (6, 17) and the front end cover (5, 18) are connected in series and fixed to the first end of the amplifier rod 4 through bolts (11, 12). The piezoelectric vibrator realizes the conversion of electrical energy into mechanical energy of super-frequency vibration. After being energized, the inverse piezoelectric effect of the second piezoelectric ceramic ring (7, 16) of the first piezoelectric ceramic ring (9, 14) is utilized to generate periodic mechanical vibration. The ultrasonic vibration energy generated by the multiple piezoelectric vibrators is simultaneously transmitted to the amplifier rod 4 through the front cover plate. The amplifier rod 4 can amplify the ultrasonic energy from the two piezoelectric vibrators. Because the ultrasonic energy remains unchanged within the entire length of the stepped amplifier rod 4, the energy density increases as the cross-section decreases, and the output amplitude of the amplifier rod 4 is large, which is beneficial to the material removal and surface modification of the cylindrical roller 2.

[0040] The multi-vibrator ultrasonic grinding device further includes an ultrasonic generator, wherein the first electrode sheets (8, 15) of the plurality of piezoelectric vibrators are connected to the positive electrode of the same ultrasonic generator, and the second electrode sheets (6, 17) of the plurality of piezoelectric vibrators are connected to the negative electrode of the same ultrasonic generator, so as to ensure that the vibration modes of the plurality of piezoelectric vibrators are consistent and avoid vibration mode aliasing.

[0041] In some embodiments, see Figure 1 、 Figure 2 Clamp 3 is offset from the axis of grinding disc 1. Clamp 3 is positioned by a swing arm and can rotate about its axis under the action of the rotation of grinding disc 1. Grinding disc 1 is driven by an electric motor, and the rotation speed of grinding disc 1 is adjustable. Cylindrical roller 2 is placed between tool head 19 and grinding disc 1. The rotation of grinding disc 1 applies friction to cylindrical roller 2, causing it to rotate about its axis.

[0042] Among them, see Figure 3The fixture 3 includes a positioning plate 20, which is thinner than the cylindrical roller 2. The positioning plate 20 is provided with a plurality of roller mounting holes 21, which extend through the positioning plate 20 along its thickness. The roller mounting holes 21 are circular holes that allow the cylindrical roller 2 to rotate about the axis of the roller mounting holes 21. The fixture 3 is provided with multiple roller mounting holes 21, which are distributed around the axis of the fixture 3. The fixture 3 is limited in position by a swing arm on the grinder. The rotation of the grinding disc 1 also allows the fixture 3 to rotate about its own axis. Multiple circular roller mounting holes 21 are evenly distributed on the fixture 3, and a cylindrical roller 2 is placed on each circular roller mounting hole 21. When the grinding disc 1 rotates, a friction force is applied to the cylindrical roller 2, so that the cylindrical roller 2 can rotate around its own axis. At the same time, since the circular roller mounting holes 21 are opened on the fixture 3, the cylindrical roller 2 is not constrained from rotating parallel to the grinding disc 1. That is, under the push of friction, the cylindrical roller 2 can also rotate parallel to the grinding disc 1, so that the end of the single cylindrical roller 2 that was originally away from the center of the grinding disc 1 gradually moves closer to the center of the grinding disc 1, and then moves away from the center of the grinding disc 1, and continues to replace in sequence, thereby solving the problem of inconsistent material removal rates of different parts of a single cylindrical roller 2.

[0043] See also Figure 4-Figure 7 There are three states of cylindrical roller 2 during the grinding process: (1) The axis of cylindrical roller 2 is perpendicular to the friction force f, as shown in Figure 4 As shown, at this time, the cylindrical roller 2 rotates around its own axis under the action of the friction force f; (2) The axis of the cylindrical roller 2 is neither perpendicular nor coincident with the friction force f, as shown in Figure 5 As shown in Figure 6, the friction force f is decomposed into an axial component f1 and a radial component f2. At this time, the cylindrical roller 2 rotates around its own axis under the action of the friction component f2. (3) The axis of the cylindrical roller 2 coincides with the friction force f, as shown in Figure 6. At this moment, the cylindrical roller 2 cannot rotate around its own axis. However, since the fixture 3 can rotate around O2 under the drive of friction and the positioning of the grinder swing arm, the fixture 3 drives the cylindrical roller 2 to rotate around O2 at a slight angle, as shown in Figure 6. Figure 7 As shown in the figure, the friction force f is decomposed into an axial component f1 and a radial component f2. Under the action of the friction force f2, the cylindrical roller 2 rotates around its own axis, that is, it returns to state (1). It can be seen that except for the moment when the axis of the cylindrical roller 2 coincides with the friction force f, the cylindrical roller 2 can always rotate around its own axis.

[0044] The cylindrical roller 2 is placed between the tool head 19 and the grinding disc 1. Under the ultrasonic high-frequency hammering, the surface of the cylindrical roller 2 undergoes grain refinement and generates residual compressive stress to improve the fatigue strength of the cylindrical roller 2. At the same time, the cylindrical roller 2 is polished due to the rotation of the grinding disc 1. Therefore, the present invention integrates the surface polishing and surface modification of the cylindrical roller 2, and can efficiently improve the quality of the cylindrical roller 2.

[0045] In some embodiments, see Figure 4 The edge of the positioning plate 20 is equipped with an annular retaining ring 22 extending in both directions along the thickness direction. The cross-section of the fixture 3 is H-shaped. The outer annular retaining ring 22 not only supports the positioning plate 20, but also better positions the cylindrical roller 2. It also cooperates with the swing arm on the grinder to limit the position, allowing the grinding disc 1 to rotate around its own axis. In addition, the annular retaining ring 22 can also guide the grinding fluid into the roller mounting hole 21, improving the grinding effect.

[0046] In some embodiments, see Figure 1 、 Figure 2 、 Figure 8 The tool head 19 extends from the first end face 23 to the second end face 24 along the thickness direction. The first end face 23 of the tool head 19 is connected to the second end of the amplifier rod 4. The tool head 19 has an outer peripheral surface 25 extending obliquely from the first end face 23 to the second end face 24. The cross-section of the tool head 19 is an inverted trapezoid. The outer peripheral surface 25 of the tool head 19 is provided with a spiral groove 26 extending from the first end face 23 to the second end face 24. The multi-vibrator ultrasonic grinding device also includes a grinding liquid supply system for supplying grinding liquid to the cylindrical roller 2. The grinding liquid supply system is provided with a liquid supply port extending to the first end face 23, which plays a cooling role. Due to the structural characteristics of the tool head 19, the grinding liquid can be evenly distributed on each roller, and the ultrasonic vibration drives the free abrasive particles to impact the roller workpiece surface.

[0047] During the processing, a certain concentration of grinding fluid is added, such as Figure 8 As shown, the grinding liquid drips onto the tool head 19, which has a spiral groove 26. This not only allows the abrasive to fall evenly onto the cylindrical roller 2, but also the spiral groove 26 structure converts part of the longitudinal vibration energy into torsional vibration. Due to the ultrasonic cavitation effect, the bubbles in the liquid expand to a critical value and then burst. The high-speed micro-jets generated after the bursting flush the surface of the cylindrical roller 2, preventing the accumulation of grinding debris on the surface of the cylindrical roller 2. At the same time, the water hammer effect brought by the high-speed micro-jets can accelerate the material removal from the workpiece surface. The strong impact will compact the micro-surface of the workpiece, which is beneficial to the surface grain refinement and improve the fatigue strength of the cylindrical roller 2. Under the multiple effects of grinding and polishing of the grinding disc 1, ultrasonic hammering and ultrasonic cavitation effect, the surface polishing and surface modification of the cylindrical roller 2 are integrated, which can effectively improve the quality of the cylindrical roller 2.

[0048] In some embodiments, the polishing liquid of the polishing liquid supply system is silicon carbide polishing liquid.

[0049] In some embodiments, the amplifier rod 4 adopts a stepped amplifier rod, and the diameter of the first end of the amplifier rod 4 is larger than the diameter of the second end. The stepped amplifier rod can amplify the ultrasonic energy from multiple piezoelectric vibrators. Because the ultrasonic energy remains unchanged throughout the entire length of the stepped amplifier rod, the energy density increases as the cross-section decreases, and the output amplitude of the stepped amplifier rod is larger, which is beneficial to material removal and surface modification of the cylindrical roller 2.

[0050] Throughout this specification, reference to terms such as "example," "embodiment," or "some embodiments" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0051] Of course, the invention is not limited to the above-mentioned embodiments. Those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A multi-vibrator ultrasonic grinding device, characterized in that: include: an amplifying rod extending from a first end to a second end along a length direction; A plurality of piezoelectric vibrators are connected to the first end of the amplifier rod, the plurality of piezoelectric vibrators are arranged in parallel, and the piezoelectric vibrators include a rear cover, a first piezoelectric ceramic ring, a first electrode sheet, a second piezoelectric ceramic ring, a second electrode sheet, and a front cover, wherein the rear cover, the first piezoelectric ceramic ring, the first electrode sheet, the second piezoelectric ceramic ring, the second electrode sheet, and the front cover are connected in series and fixed to the first end of the amplifier rod by bolts; a tool head connected to the second end of the amplification rod; A grinding disc, arranged to rotate about its own axis; A clamp is provided between the tool head and the grinding disc, and the clamp is provided with a plurality of roller mounting through holes; An ultrasonic generator, wherein the first electrode sheets of the plurality of piezoelectric vibrators are connected to the positive electrode of the same ultrasonic generator, and the second electrode sheets of the plurality of piezoelectric vibrators are connected to the negative electrode of the same ultrasonic generator; The tool head extends from the first end face to the second end face in the thickness direction, the first end face of the tool head is connected to the second end of the amplifier rod, the tool head has an outer peripheral surface extending obliquely from the first end face to the second end face, and the outer peripheral surface is provided with a spiral groove extending from the first end face to the second end face. The multi-vibrator ultrasonic grinding device also includes a grinding liquid supply system for supplying grinding liquid to the cylindrical roller, and the grinding liquid supply system is provided with a liquid supply port extending to the first end face.

2. The multi-vibrator ultrasonic grinding device according to claim 1, characterized in that: The clamp deviates from the axis of the grinding disc, is limited by a swing arm, and can rotate around the axis of the clamp under the rotation of the grinding disc.

3. The multi-vibrator ultrasonic grinding device according to claim 2, characterized in that: The fixture includes a positioning plate, the thickness of which is smaller than that of the cylindrical roller. The positioning plate is provided with a plurality of roller mounting through holes, which pass through the positioning plate in the thickness direction. The roller mounting through holes are circular holes in which the cylindrical roller can rotate around the axis of the roller mounting through holes.

4. The multi-vibrator ultrasonic grinding device according to claim 3, characterized in that: The clamp is provided with a plurality of roller mounting through holes, and the plurality of roller mounting through holes are distributed around the axis of the clamp itself.

5. The multi-vibrator ultrasonic grinding device according to claim 3, characterized in that: The edge of the positioning plate is provided with an annular retaining ring extending to both sides along the thickness direction.

6. The multi-vibrator ultrasonic grinding device according to claim 1, characterized in that: The grinding liquid of the grinding liquid supply system adopts silicon carbide grinding liquid.

7. The multi-vibrator ultrasonic grinding device according to claim 1, characterized in that: The amplifier rod is a stepped amplifier rod, and the diameter of the first end of the amplifier rod is greater than the diameter of the second end.

Images